Paper airplane



FIG. 1 is a top, left, rear perspective view of a paper airplane showing my new design;

FIG. 2 is a right, front, bottom perspective view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top elevational view thereof; and,

FIG. 7 is a bottom elevational view thereof. 

The ornamental design for a paper airplane, as shown and described. 